Solopov

pp. 66-75

pp. 323–338

pp.78-100

The paper presents the created finite element models of car seats with passive head restraints of three levels of complexity, conducts their analysis in terms of the simulation error assessment and meeting the UNECE Regulations No 25. It discusses the basic principles for designing the finite element models of head restraints and car seats with different complexity. These models are assessed in terms of result errors and effort to develop and find solution, using software packages (ANSYS, Femap and LS-DYNA) that implement the finite element method. Performed calculations based on the finite element method give a possibility to analyze a large data file about the process of emergency loading, which is required to estimate the safety of car seats in the case of the rear-end impact to car.

In this work rational finite element models of head restraints of car seats were developed. Assessment of those models regarding errors of simulation and correspondence to the requirements of UNECE Regulations № 25 was carried out. Those models were also evaluated regarding errors of results; labor cost of development and solving with the use of software packages which implement the FEM (ANSYS, Femap and LS-DYNA) was also carried. Calculations based on the finite element method provide a possibility to obtain the whole information on the process of emergency loading required for estimating safety of car seats in case of  rear-end collisions.

In this work rational finite element models of head restraints of car seats were developed for studies of passive safety under impact loading, affected in accordance with the current standard of passive safety. Assessment of those models regarding errors, labor cost of development and solving with the use of software packages which implement the FEM (ANSYS, Femap and LS-DYNA) was carried out along with assessment of influence of head restraint’s materials on the solution. Calculations based on the finite element method make it possible to obtain the whole information on the process of emergency loading required for estimating the safety of car seats in case of  rear-end collisions.